C# DataTable 用法简介

DataTable dt=new DataTable();如果带个String参数，此参数表示表名。

//数据库的Nvarchar等类型，在此可用String兼容。可不指明数据类型
DataColumn dc = new DataColumn("商品编号", typeof(system.string));

dt.Columns.Add(dc);

dt.Rows[i].SetField<int>(dc, int.Parse(hc.Values[i]);

dt.Rows.Add(dr.ItemArray);

DataTable ds=car.getGoods(v);	//从数据库里读出的表
dt.Merge(ds);	//将 ds 表合并到表 dt

dt = ds.Clone();

protected void Page_Load(object sender, EventArgs e)
{
        HttpCookie hc=Request.Cookies["goods"];
        DataTable dt = new DataTable();
        DataColumn dc1 = new DataColumn("商品编号");
        DataColumn dc2 = new DataColumn("商品名称");
        DataColumn dc3 = new DataColumn("商品重量");
        DataColumn dc4 = new DataColumn("商品价格");
        DataColumn dc5 = new DataColumn("购买数量");
        dt.Columns.Add(dc1);
        dt.Columns.Add(dc2);
        dt.Columns.Add(dc3);
        dt.Columns.Add(dc4);
        dt.Columns.Add(dc5);
        TemplateField fd = new TemplateField();
        fd.HeaderText = "数量";
        if (hc != null)
        {
            for (int i = 0; i < hc.Values.Count; i++)
            {
                string c = hc.Values.Keys[i];
                string v = c.Replace("goodName", "");
                DataTable ds=car.getGoods(v);
                DataRow dr=ds.Rows[0];
               // fd.ItemTemplate = new gr

                //dt = ds.Clone();
                //dt.Merge(ds);
                dt.Rows.Add(dr.ItemArray);
                dt.Rows[i].SetField<int>(dc5,int.Parse( hc.Values[i]));
               
                
            }
        
            GridView1.DataSource = dt;
            GridView1.DataKeyNames = new string[] {"商品编号"};
			GridView1.DataBind();
			dt.Dispose();
        }
    }